Refining hydrocarbon oils



Jan., 8, 1929. 1,698,428

y H. J. BRoDERsoN REFINING HYDROCARBON OILS Filed June 7,. 1924 PRE/ETER IMQ@ Yew ffOc/eow/ Patented Jan. 8, 1929.

x'UNITI-:D STATES PATENT OFFICE.

HENRY J. BRODRRSON, or WHITING, INDIANA, AssIGNOR To STANDARD OIL coil:-

PANY, OF WRITING, INDIANA,

A CORPORATION OF INDIANA.

RDFINING HYnRooARBON Orts.

Appiication mea June 7, 1924. serial No. 'rias-74.

The present invention relates to improvements in the refining of hydrocarbon oils, and more particularly ofthe lighter distillate oils, such as naphthas', pressure still. distillates, burning Oils and the like. It will be fully understood from the following description illustrated `by the accompanying drawings,'in which apparatus suitable for carrying the invention into effect is shown diagramniatically, and partly in section.

Referring more particularly to the drawing, the numeral .5 indicates a receptacle having a conical bottom provided with a drain pipe 6.. This receptacle is ofthe usual form employed in refineries for treating puroses for exam le as aitators. 7 7

The oil to be treated, which may be, for example, pressure still distillate, is pumped or forced by any suitable means from `a source of supply through the supply pipe 7 into and through the preheater 8. From the -preheater 8, the oil passes into a suitable mixing device, for example, the bailler mixer 9, in which it is .thoroughly mixed withv treating liquid, as hereinafter set forth, From the mixer 9 the oil, admixcd with treating liquid, passes through pipe 10 into a discharge pipe 11, by which it is discharged -into the receptacle 5. .The discharge pipe 11 has aclosed end\and extends nearly to the bottom of the receptacle, being provided near its. lower end with pcrforations 12, through which the mixture of oil and treat# ing liquid enters the receptacle 5. `In -the receptacle 5 the oil and treating liquid separates, the treating liquid settling to thel bottom and suilcicnt'thereof being maintained in the receptacle to ykeep its level above the perforations 12 in the discharge pipe 11, for example, as indicated at 13. The

- l separated oiltoverflows from thereceptacle 5 through the Overlow pipe 14. Separated treating liquid is withdrawn from the bottom of the receptacle 5 through the drain pipe 6V by the pump 15, lwhich forces it. through the pipe 16 into the mixer 9 in forced from the source of su ply to the pipe 7, and the preheater 8 in o the mixer 9, the pump 15 being simultaneously operated to force in la' suitable proportioniof doctor solution withdrawn from the bottom of the agitator or rece tacle This proportion may suitably be rom 5 to 10% of the oil in volume. -The oil, in ,'a'ssing'through the preheater 8, may suita ly be'brought to a temperature of 80 to 100 Fg; .In passing through the mixer 9 the Oil and'doct'or'solutionare thoroughly mixed, land together pass through the pipe 10 into the pipe 11', which leads the admixed oil and doctorsolution .into the agitator- 5 and discharges them-through the perforations 12 intol the body of separated doctor solution therein, the latter being suitably maintained at the level 13. Inpassing through the bodytof doctor solution there is a further washing or treating action of the doctor solution upon the oil,l The oil separates fromythe doctor solution, the latter descending into the lowerportion of the a itator while oil overflows through theover ow pipe 14. An extremely rapid and efficient treating of the oil is thereby effected.

i Iii-desired, vthe preheater 8 may be eliminated from the system, and with certain distillates, `such as straight run naphtha, and the like, in general the use of a preheater is" not necessary. It is found preferable, however, to control the preheater to secure a desiredoil temperature of, suitably, from 80 to 100 F., the optimum conditions for any specific distillate t-o be treated being readily determined by experiment.

1'. The method of refiningv hydrocarbon oil distillates in continuous low4 which comprises heating a flowing stream of such distillate to a temperature of 80 to 100 F., maintaining a body oftreating reagent, 'withdrawing treating reagent continuously from said body of ltreating* reagent and admixing it with the flowing stream of heated oil, conducting the stream of oil and admixed reagent into the body of liquid treating re#l agent below its surface, whereby the oil is forced to travel through the bodyof treating reagent, permittingsepa-ration of the oil above the body of treating reagent and continuously withdrawing separated oil.

2. The method of sweetening hydrocarbon oil distillate in continuous flow which comprises heating a flowing stream of such disJ tillate to a temperature of 80 to 100 F.,-

, maintaining a body of doctor solution, withdrawing doctor solution continuously from said body of doctor solution and -admixing it with the flowing stream of heated oi1,-con- 'ducting the stream of oil and admixed doctor .solution into the body of doctor solution -.be1ow its surface, whereby the' .oil is forced to travel through the body of doctor solution, permitting separation of the oil above the body. of doctor solution, and continuousf 1y withdrawing separated oil.

3. An apparatus for treating hydrocarbon oil distillates with doctor comprising. a"

rece tacle, an eduction pipe leadingfrom the ottom thereof and adapted to withdraw doctor therefrom, a pump in said educ-- ying' with 'said heating means, conduit means leadingfom said mixer to 'I the lower portion of said receptacle, means for subdividing-the incoming liquid Vfromsaid conduit and 'means for withdrawing oil from said receptacley at 'an elevated' partithereof.

4. In `apparatus for treating hydrocarbon oil distillat'es, a recep'tacle adapted to contain a body of a liquid treating reagent, a heating device, a mixingdevice, means for forcin themixing device, means for withdrawing treating reagent 'from' the bottom ofsaid receptacle and forcing it' into the mixing oilvthrough ,the heating device intodevice in proximity to the point of entrance of theoil, means for withdrawing mixed oil and treating reagent from the mixing device and forcing it in finely divided condition into the lower portion of the receptacle` and means `for-continuously withdrawing treatedVV oil from said receptacle.

HENRY J. BRoDERsoN. 

